Literally every protest ever of any substantial size is a mixed bag. There are always going to be people that either press things too far or use the premise of the protest as cover to push an agenda that's actually nefarious in nature. The infamous Charlottesville Unite the Right rally is perhaps the greatest example of this where there were many, many peaceful protestors/demonstrators on both sides, but there were also quite a few groups that used the premise of the rally as an excuse to intimidate others, inflict violence on others, or otherwise engage in activities that most of the people in attendance would find abhorrent (such as the tiki torch mob that was marching and chanting "Jews will not replace us!" etc).
What Brisket is trying to say to you is that we cannot be lulled into a state where we begin to accept the US government imprisoning, black bagging, and/or deporting people who are not engaging in illegal activities simply because they are engaging in speech that our elected representatives do not like.
Once we begin to accept that, we are lost as a society, period. Civil disobedience has been one of the (if not THE) greatest tools available to affect positive change on our society from a civil rights perspective, and people like you are [seemingly] unwittingly cheering on the government's attempts to destroy that tool with finality. It's very dismaying to see.
Again, no one disagrees with you that antisemitism is a problem, and no one disagrees that antisemitism increased (worldwide, not just on college campuses) after the events of October 7th, it was inevitable, and it fucking sucks. People suck. Our highest levels of government are now infested with actual antisemitic pieces of shit. A White House deputy chief of staff and homeland security advisor is an out and about actual unapologetic neo-Nazi. These people do not give the slightest shit about Jewish people beyond using them and the state of Israel as a tool to ultimately silence and/or punish all speech critical of their actions.